blue-green-deployment

blue-green-deployment is a skill for Claude Code, Codex from aj-geddes/useful-ai-prompts. It costs 26 tokens per session (563 once invoked), scanned A, original, MIT.

A release setup with two matching production environments: one serving users while the other receives the new version.

In plain words
What is it for?
Use it for high-risk releases, database changes, migrations, staged rollouts, separated A/B tests, and deployments that need rapid rollback.
Why use it?
It allows traffic to move between environments, supporting releases without downtime and quick rollback when problems appear.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it for high-risk releases, database changes, migrations, staged rollouts, separated A/B tests, and deployments that need rapid rollback.

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Install with agentmods
npx agentmods add skills/aj-geddes/useful-ai-prompts/blue-green-deployment
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add aj-geddes/useful-ai-prompts --skill blue-green-deployment
Clone the repo
git clone --depth 1 https://github.com/aj-geddes/useful-ai-prompts

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for blue-green-deployment

README.md
[![agentmods](https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/blue-green-deployment/github.svg)](https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/blue-green-deployment)
Your own site
<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/blue-green-deployment"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/blue-green-deployment/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for blue-green-deployment

Your own site · 80×15
<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/blue-green-deployment"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/blue-green-deployment.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 563 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 18 Mar 2026
  • Snyk pass 4 Mar 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00026 $0.00563
Opus 5 $0.00013 $0.00282
Sonnet 5 $0.00005 $0.00113
Haiku 4.5 $0.00003 $0.00056

Measured 12d ago against content hash e9f7fb37e87f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

blue-green-deployment scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/validate-schema.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/blue-green-deployment/SKILL.md · 89 lines

How it starts

The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Blue-Green Deployment

Table of Contents

Overview

Deploy applications using blue-green deployment patterns to maintain two identical production environments, enabling instant traffic switching and rapid rollback capabilities.

When to Use

  • Zero-downtime releases
  • High-risk deployments
  • Complex application migrations
  • Database schema changes
  • Rapid rollback requirements
  • A/B testing with environment separation
  • Staged rollout strategies

Quick Start

Minimal working example:

# blue-green-setup.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: blue-green-config
  namespace: production
data:
  switch-traffic.sh: |
    #!/bin/bash
    set -euo pipefail

    CURRENT_ACTIVE="${1:-blue}"
    TARGET="${2:-green}"
    ALB_ARN="arn:aws:elasticloadbalancing:us-east-1:123456789012:loadbalancer/app/myapp-alb/1234567890abcdef"

    echo "Switching traffic from $CURRENT_ACTIVE to $TARGET..."

    # Get target group ARNs
    BLUE_TG=$(aws elbv2 describe-target-groups \
      --load-balancer-arn "$ALB_ARN" \
      --query "TargetGroups[?Tags[?Key=='Name' && Value=='blue']].TargetGroupArn" \
      --output text)

    GREEN_TG=$(aws elbv2 describe-target-groups \
      --load-balancer-arn "$ALB_ARN" \
// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide Contents
Blue-Green with Load Balancer Blue-Green with Load Balancer
Blue-Green Rollback Script Blue-Green Rollback Script
Monitoring and Validation Monitoring and Validation

Best Practices

✅ DO

  • Follow established patterns and conventions
  • Write clean, maintainable code
  • Add appropriate documentation
  • Test thoroughly before deploying

Read the full file on GitHub · 89 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 89 lines · 26 tokens per session scan A e9f7fb37e87f

Subscribe to this mod's changes

blue-green-deployment is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (338 stars, last pushed 6mo ago), licensed MIT. It adds 26 tokens to every session and 563 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.